Q: What are the prime factors of the number 401,251,632?

 A: 2, 3, 193, 43313

Why are those the prime factors of the number 401,251,632?

Prime factors are the prime numbers that can be multipled together to equal the original number. You find the factors by dividing by prime numbers. It is best shown by creating a Factor Tree.

Factor Tree for the number 401,251,632

401,251,632
Factor Arrows
2200,625,816
Factor Arrows
2100,312,908
Factor Arrows
250,156,454
Factor Arrows
225,078,227
Factor Arrows
38,359,409
Factor Arrows
19343,313

The numbers in bold above are the prime factors. If there are multiples, you only count them one time. This leads us to our prime factors of:

2, 3, 193, 43313

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 3 x 193 x 43,313 = 401,251,632

This can also be written as 24 x 31 x 1931 x 43,3131 = 401,251,632

If you would like to know more, or need additional explanation, please review our prime factorization explanation.


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